Immortus. Remember what he did to Carol Danvers? 😬

Ultron. He's a robot who wants to destroy humanity because he sees their sins on this planet. He thinks machines are the superior beings and wishes to make them the only beings. It's scary because he's got a point. Humans are just the worst and machines outwit us in every way, like who cares if you're the world's smartest man since Einstein when google exists?

Then again there's Thanos who in the comics pursues genocide because he's got a hard on for a skull girl. Damn man he's just like me...

^Well said

Sabretooth is a pretty sadistic asshole when he wants to be.

Jailer

- He just tortures prisoners to death everyday.

Green Goblin

On this list i wanna say mister Sinister, well it used to be

They should make a movie called Venom versus Morbius starring Tom Hardy and Jared Leto

Now if I had to pick an mcu version of Thanos or Ultron I would pick Ultron due to the fact that he almost won and took quicksilver away from us.However I find comic Thanos more disturbing due his lack of calm and obsession with death.I prefer MCU Thanos to comic version because he has a goal to work towards and genuinely believes that this could help the universes extinction but comic Thanos is more of a genocidal manic obsess with boning death.